Improvement in vacuum railway-brakes



J. D. JOHNSON. Vacuum Railway-Brake.

No. 196,459. Patnted Oct. 23, 1877.

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JOHN D. JOHNSON, OF RIOHMOND,ASSIGNOR OF A PART OF HIS RIGHT TO ItIOHD. D. MORKILL, JR, AND EDIVARD DALE, OF SHERBROOKE, AND

UNITED STATES PATENT OEEIoE.

THOMAS HART, OF RICHMOND, QUEBEC, CANADA.

IMPROVEMENT IN VACUUM RAILWAY-BRAKES.

Specification forming part of Letters Patent No. 196,459, dated October 23, 1877 application filed September 8, 1877.

To all whom it may concern:

Be it known that I, JOHN DIXON J oHNsoN, of the village of Richmond, in the county of Richmond, and Province of Quebec, of the Dominion of Canada, have invented new and useful Improvements on Vacuum Railway- Brakes, which improvements are fully set forth in the following specification and accompanying drawing, in which- Figure l is a sectional end elevation, and Fig. 2 a longitudinal section of the firebox of a locomotive with my improvements attached.

The object of my invention is to furnish a device whereby the objectionable noise produced by vacuum railway-brakes may be obviated.

In the drawings, A is a water-lined guard, consisting of an inclosed metallic chamber, in direct communication with the water-space in front of the fire-box by means of the connecting-passages I? P. The water-lined guard is constructed of such a shape as to inclose a space, E, between it and the front of the firebox, the said space being of such dimensions as will freely allow the steam to escape from the nozzles O O of a vacuum-brake, which are placed at the bottom of the inclosed space B, in such a position that the steam escaping from. the nozzles will impinge against the curved deflector or guide G, the guide being of such conformation and in such a position as to direct the escaping steam toward and through Z the tubes of the boiler, affording it aready es- 1 cape to the atmosphere without injury to the K fire-box or to the boiler, and also without the 1 usual objectionable noise.

In cases where the heat of the fire is so 1ntense as to fuse the guide Gr when only constructed of sheet metal, I prefer to make it water-lined, and, in connection with the waterspace of the fire-box, materially the same as shown and described with regard to the guard A.

To the door of the fire-box is attached, by

means of ferrules and bolts or other suitable contrivance, a thick and closely-fitting plate of iron, T, for the PHIPOSG of more completely JOHN D. JOHNSON.

Witnesses ARTHUR J. CLEVELAND, ROBERT 1. focus. 

